Tire sidewall



FIG. 1 is a perspective view of a tire sidewall showing our new design;

FIG. 2 is a front elevational view thereof; and,

FIG. 3 is an enlarged fragmentary perspective view taken from FIG. 2 thereof.

The dashed broken lines indicating an enlargement portion of the design form no part of the claimed design. 

CLAIM The ornamental Design for a tire sidewall, as shown and described. 